解题方法
1 . 已知四棱锥
中,底面
为菱形,点E为棱PC上一点(与P、C不重合),点M、N分别在棱PD、PB上,平面
∥平面
.
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960912474062848/2962472470265856/STEM/f2712dd7287a49ceb2eff36478c456cc.png?resizew=228)
(1)求证:
∥平面
;
(2)若E为PC中点,
,
,
,求点A到平面EBD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868a98a5d6337c3dd9bca228e3545665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960912474062848/2962472470265856/STEM/f2712dd7287a49ceb2eff36478c456cc.png?resizew=228)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
(2)若E为PC中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17e228085eaa3c91d68620582ab6b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45884ed34b6a258ee31c137f13b01610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4125524caac016727c80d2722c5ba3.png)
您最近一年使用:0次
2 . 风筝起源于春秋时期,是中国古代劳动人民智慧的结晶,北方也称“纸鸢”,虽经变迁,但时至今日放风筝仍是人们喜爱的户外活动.如图,一只风筝的骨架模型是四棱锥
,其中
于
平面
.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958094514905088/2959870925791232/STEM/50ebe303-f09b-47d7-8d1a-37700de0aa20.png?resizew=248)
(1)求证:
;
(2)若
,为使风筝保持最大张力,平面
与底面
所成二面角的正切值应为
,求此时
到㡳面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9df4efa019ebbc4518ca4ffb8303bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958094514905088/2959870925791232/STEM/50ebe303-f09b-47d7-8d1a-37700de0aa20.png?resizew=248)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d2d267caf23c33bf34f6e2764ada9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2022-04-17更新
|
544次组卷
|
3卷引用:甘肃省2022届高三第二次高考诊断考试数学(文)试题
甘肃省2022届高三第二次高考诊断考试数学(文)试题(已下线)回归教材重难点03 立体几何-【查漏补缺】2022年高考数学(文)三轮冲刺过关2023版 湘教版(2019) 必修第二册 过关斩将 第4章 专题强化练7 空间角和距离
名校
解题方法
3 . 如图,
是边长为
的等边三角形,
分别在边
上,且
,
为
边的中点,
交
于点
,沿
将
折到
的位置,使
.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938055260528640/2938766415732736/STEM/4af951b9009e4b49b65297598c75cd06.png?resizew=182)
(1)证明:
平面
;
(2)若平面
内的直线
平面
,且与边
交于点
,
是线段
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36c8ba3a183222fb7ec83bddf8b30c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde89cfc58a166b6a985f640fd174fd0.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938055260528640/2938766415732736/STEM/4af951b9009e4b49b65297598c75cd06.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b7675ff57bdccb95a8241c1cd09f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03952d664fba91020fc5f3bcf2f9746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752dc3cc77f0d0ec4a1d0981970410a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbb5d97a06c189af2032a1b551ca0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b41eda406756ba4d5588460665f7012.png)
您最近一年使用:0次
2022-03-18更新
|
671次组卷
|
5卷引用:甘肃省2022届高三下学期第一次高考诊断数学(文)试题
名校
解题方法
4 . 直三棱柱
中,
为正方形,
,
,M为棱
上任意一点,点D、E分别为AC、CM的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/53ef0522-8a05-438d-90ad-7c82c2c8030c.png?resizew=181)
(1)求证:
平面
;
(2)当点M为
中点时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/53ef0522-8a05-438d-90ad-7c82c2c8030c.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75aea24647cd4d0b4b9aa513bf5457b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
(2)当点M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4711ea198eebe0a72ef2c66a9dd51b83.png)
您最近一年使用:0次
2022-03-17更新
|
2151次组卷
|
6卷引用:甘肃省武威市凉州区2022届高三下学期质量检测数学(文)试题
名校
解题方法
5 . 已知圆
.
(1)若圆
的切线在
轴和
轴上的截距相等,且截距不为零,求此切线的方程;
(2)从圆
外一点
向该圆引一条切线,切点为
,且有
(
为坐标原点),求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97d9a51394b190f99b75bd277178ffc.png)
(1)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)从圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e0cac807d10c3dc2f00f29d1687f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d341082cc54b1cb7a790af9ec4a365d.png)
您最近一年使用:0次
2023-01-13更新
|
246次组卷
|
10卷引用:甘肃省静宁县第一中学2020-2021学年高三上学期第四次模拟考试数学(文实)试题
甘肃省静宁县第一中学2020-2021学年高三上学期第四次模拟考试数学(文实)试题甘肃省静宁县第一中学2020-2021学年高三上学期第四次模拟考试数学(理)试题四川省绵阳市绵阳南山中学2019-2020学年高二上学期9月月考数学试题四川省绵阳南山中学2020-2021学年高二10月月考数学(文)数学试题四川省资阳中学2022 届高三上学期第一次质量检测数学试题广东省深圳市宝安中学2019-2020学年高二上学期期中数学试题四川省南充市嘉陵第一中学2021-2022学年高二上学期9月月考数学试题 四川省资阳中学2021-2022学年高三上学期第一次质量检测数学试题新疆维吾尔自治区巴音郭楞蒙古自治州和硕县高级中学2022-2023学年高二上学期期末考试数学试题四川省绵阳实验高级中学2022-2023学年高二下学期开学考试理科数学试题
名校
解题方法
6 . 如图①,在菱形
中,
且
,
为
的中点.将
沿
折起使
,得到如图②所示的四棱锥
.
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734314768089088/2744322102763520/STEM/4a45f3a39658428780256945a4beb275.png?resizew=310)
(1)求证:
平面
.
(2)若
为
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734314768089088/2744322102763520/STEM/4a45f3a39658428780256945a4beb275.png?resizew=310)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce066003c0a1f0879cbca2f32802e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b183492677d0457b8701c53d9fa1414.png)
您最近一年使用:0次
2021-06-16更新
|
952次组卷
|
7卷引用:甘肃省天水市第一中学2021届高三十模数学(文)试题
甘肃省天水市第一中学2021届高三十模数学(文)试题(已下线)考点34 直线、平面垂直的判定及其性质-备战2022年高考数学(理)一轮复习考点帮(已下线)7.3 空间几何体积及表面积(精讲)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)第九章立体几何专练16—翻折问题-2022届高三数学一轮复习宁夏青铜峡市高级中学2021-2022学年高二上学期期中考试数学(文)试题新疆师范大学附属中学2022届高三9月月考数学(文)试题(已下线)第2讲 空间点、线、面的位置关系(讲·)-2022年高考数学二轮复习讲练测(新教材地区专用)
7 . 如图,在圆锥
中,
为
的直径,点
在
上,
,
.
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718671582076928/2725943324737536/STEM/db63be4e-7165-4c0c-96e4-f483e6d82216.png?resizew=224)
(1)证明:
平面
;
(2)若直线
与底面所成角的大小为
,且底面圆的面积为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8dccfaf49b0f8e0fd927f30a50cdfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d81d0bc9531fb9340cdbd0ff55fb44.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718671582076928/2725943324737536/STEM/db63be4e-7165-4c0c-96e4-f483e6d82216.png?resizew=224)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b3a91ccf6028608cd03df7072f6536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9819d39cb7374fa753e206022e19f3.png)
您最近一年使用:0次
2021-05-21更新
|
756次组卷
|
4卷引用:甘肃省高台县第一中学2022届高三下学期第七次检测数学(文)试题
甘肃省高台县第一中学2022届高三下学期第七次检测数学(文)试题四川省凉山州2021届高三三模数学(文)试题(已下线)13.4 立体几何初步综合练习-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)(已下线)一轮复习大题专练44—立体几何(体积3)-2022届高三数学一轮复习
名校
解题方法
8 . 如图是矩形
和以边
为直径的半圆组成的平面图形,
.将此图形沿
折叠,使平面
垂直于半圆所在的平面.若点E是折后图形中半圆O上异于A,B的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/08466985-cf10-48a3-ace0-2eff8fd6630c.png?resizew=334)
(Ⅰ)证明:
;
(Ⅱ)若异面直线
和
所成的角为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45187cdeb695ced04c4736583520d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/08466985-cf10-48a3-ace0-2eff8fd6630c.png?resizew=334)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad2dc5dea4563dfd9afefeb8b210eeb.png)
(Ⅱ)若异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade68d3f913ba0357f38a808392f5820.png)
您最近一年使用:0次
2021-05-12更新
|
671次组卷
|
5卷引用:2021届甘肃省天水市第一中学高三第九次模拟数学(文)试题
9 . 如图,四棱锥
中,
平面
,
,
,
,
为
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712385258979328/2712641336844288/STEM/419a40c0-2d2c-4daa-8b1e-0c4a413d2dfb.png?resizew=245)
(1)证明:平面
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8d6911eab97f52e844edc9d2e5ee83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a267fbb6515384ffa026639abe17cf7f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712385258979328/2712641336844288/STEM/419a40c0-2d2c-4daa-8b1e-0c4a413d2dfb.png?resizew=245)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14172212b7b34eaf967c5a72233621c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95e78927443bbadb5bf60f1c836ea24.png)
您最近一年使用:0次
2021-05-02更新
|
954次组卷
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7卷引用:甘肃省民乐县第一中学2021届高三押题卷(二)数学(文)试题
名校
解题方法
10 . 如图,在直四棱柱
中,底面
是边长为
的菱形,且
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/bdb58bf6-20a6-4bc9-b0aa-f18e58b6c821.png?resizew=157)
(1)证明:
平面
;
(2)若
,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/bdb58bf6-20a6-4bc9-b0aa-f18e58b6c821.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
您最近一年使用:0次
2021-04-17更新
|
1420次组卷
|
9卷引用:甘肃省2021届第二次高考诊断文科数学试题
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